Method for promoting hydrocarbon generation via hydrogen transfer at the organic-mineral interface in shale

Abstract

The invention provides a method for promoting hydrocarbon generation via hydrogen transfer at the organic-mineral interface in shale, aiming to address the issues of low interface hydrogen transfer efficiency and insufficient hydrocarbon conversion rates in current shale oil generation processes. This method involves selecting clay minerals such as montmorillonite or kaolinite from shale, and using a metal ion doping-interlayer domain regulation composite modification method to prepare modified clay minerals with high hydrogen transfer activity. After combining these modified minerals with shale organic matter at a specific ratio, the mixture is heated under an inert atmosphere at 300-500 Celsius. Real-time hydrogen gas supplementation is used to maintain the interface hydrogen partial pressure, thus establishing an efficient hydrogen transfer channel. The invention improves the interface hydrogen transfer rate of clay minerals by 40-60%, increases the hydrocarbon generation conversion rate of shale organic matter to 55-70%, and is characterized by low modification costs, broad applicability, and suitability for shale of varying maturities. This provides key technical support for the efficient development of shale gas.

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